Trolley-head.



O. N. IVBRSON.

TROLLEY HEAD. APPLICATION FILED IEB.28, 191s Patented Mar. 3, 1914.

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mmzrrug: 0/} Wmmm, .Brhis ATTORNEY.-

WITNESSES OLE N. IVERSON, OF HILLS, MINNESOTA.

TiaoLLEY-HEAD.

Specification of Letters Patent. Application filed February 2s. 1.913.

Patented Mar. 3, 1914:. Serial No. 751,306.

To all whom it may concern:

Be it known that I, OLE N. IvnusoN, a citizen of the United States, residing at Hills, in the county of Rock and State of Minnesota, have invented a new and useful 'lTr'olley-Head, of which the following is a specification.

My invention relates to trolley heads, and the object is to furtl'ier improve in several respects the trolley head described in my United States Patent No. 1,048,31 1 which was granted to me on the 24th day of December 1912.

The various new improvements will appear from the hereinafter following description and the accompanying drawing, in which,--

Figure 1 is a side elevation of the upper end of a trolley pole provided with the improved head. Fig. 2 is a top or plan view of what is shown in Fig. 1. Fig. 3 is a bottom view of a portion of Fig. 2 with some parts omitted. Fig. 1. Fig. 1 near the middle of the same. is a section on the line a-a Fig. 4.

Referring to the drawing by reference nu- Fig. 5 is an enlarged portion of Fig. 6

merals, 1 designates the lower section of a trolley pole composed of said section and of an upper section 2, which is secured thereto by a hinge 3 said hlnge 1s dlsposed some d1s tance beyond the upper side of the pole.

The free end of the upper section constitutes a fork 4 in which the trolley wheel 5 is mounted to rotate on a shaft 6 fixed in the fork by a set screw 7, or other suitable means.

Retained by cotter pins 8, or other suitable means, is journaled upon each projecting end of the shaft 6 an angle lever having a long arm 9 and a short arm 9. In the arm 9 is journaled a shaft 10 having its lower end retained by a pin 11 (best shown in Fig. 6) and its upper end formed into a line wire guard 12, which extends rearwardly and inwardly over the edge of the pulley. Its position in over the pulley may be regulated by an arm 13 which is secured on the shaft 10 by a screw 14, and is normally held against the outer side of the lever arm 9 by a torsion spring 15 arranged about and fixed to the shaft in the manner best shown in Fig. 4, said spring serving to hold the guard yieldingly yet firmly in a position calculated to prevent the trolley wheel from leaving the line wire 16. The short arm 9? of the lever is provided with a headed pin or stud 17,

Fig. 4; is an enlarged portion of:

which is passed through a slot 18 of a rod 19, which rod is connected to the arm 9 by a contracting coil spring 20, which holds the rod normally with the front terminal of the slot against the pin 17 The front end of the rod 19 is pivoted at 21. to the upper end of a link 22 (best shown in Fig. 5) and provided with a hook 23 normally engaging a lug 2 1 on the front member 3 of the hinge 3. The lower end of the link 22 is pivoted on a stud 25 fixed in the member 3. On said stud is also pivotally mounted one arm of a Y- shaped lever 26 whose other arm 27 is formed with a hook 28 which normally engages the rear edge of the link bar 22. The leg of the Y-shapcd lever stands almost horizontally and is pivotally connected at 29 with the upper end of a link 30, the lower end of said link 30 is very loosely pivoted at 31 (see Fig. 3) to one end of a beam lever 32, which at its middle is fixed on a shaft 33 by a set screw 33". Said shaft33 is journaled in the end portions 34 and 35 of a yoke-shaped rearward extension 36 of the hinge member 3 (best shown in Figs. 3 and 1), and the latter member is preferably cast integral with a sleeve 3 which is secured on the pole section 1 while the hinge member 2 may preferably be cast integral with the fork section 2 of the pole. Longitudinal movement of the shaft 33 is prevented by two collars 37, 38 secured by set screws 39, and the rear end of the shaft is provided with a downward arm 33 on which a weight 40 is adjustably secured by a set screw 41.

The lower end of the hinge member 2 carrics an eyebolt 4:2, and the rear terminal 341 of the extension 36 carries another eyebolt 43, the latter provided with a thumb nut 14:, by which to regulate the tension of a helical spring 45 which is attached to said two eyebolts and tends to bend the joint 3 and maintain the trolley wheel in contact with the line wire 16 also when the equilibrium of the trolley pole is disturbed by moving of the car over uneven parts of the track, or by any other causes which tend to swing the pole downward. The usual main springs (not shown) which are arranged upon the car for holding the trolley pole elevated with the trolley wheel in contact with the trolley wire, is understood to be strong enough to hold the trolley gently up under the wire and also to hold the spring 15 normally stretched and the pole sections 1 and 2 in alinement, and only when said main spring yielding movement of the guards 12 in passing joints and other obstructions-on the line wire.

The usual hand rope 46 is suspended from a clevis 47, which is pivoted at 4:8 to the pole section 2 and is normally held rearwardly by aspring 19 against a pin 50, but is also provided with a notch 51 adapted to engage a pin 52 when the pole is to be held down from the line wire for any considerable length of time.

In Fig. 5 is shown a spring 5 1 which acts on an arm 55 of the link 22 so as to hold the hooks 23 normally against the lugs 24 and thereby the guards 12 in the normally raised position.

Of the several modifications which it is unnecessary to illustrate, as they are but usual mechanical expedients, I may mention that in the manufacture it will be proper to make the joints 29 and 31 of rod 30 ball-andsocket joints, but in cheap construction it will also do to use simple pivot joints with sufficient play in them to permit the beam 32 to tilt up and down with its ends.

Most of the mechanism described being the same at both sides of the pole it will be understood that either and both sides are referred to in the description given.

In the description thus given the operation of the device is so fully disclosed and understood that only this explanation need be added: When the car runs on a curve of the track the trolley wheel has an extra great tendency to escape from the line wire toward the outer side of the curve especially as the line wire is not a true curve but contains several obtuse angles and splices to the cross wires; to guard against said extra tendency the guard 12 that is at the inner side of the curve of the wire is raised extra high up by the adjacent rod 19, the hook 28,. lever 26, link 30 and one end of the beam 32 the latter being tilted by the shaft 33 and the weight 10, since said weight is by its momentum swung toward the outer side of the curve of the road; while this takes place the link rod 30 at the opposite of the pole pushes upward but without any other effect than to push the hook 28 rearwardly away from the link 22. V

What I claim is 1. In a device of the kind described, the combination of a trolley pole having a main section and a hinged extension or top section time the spring connecting the rod with the arm,

with a fork-shaped upper end, a shaft fixed in the fork and traversing the gap of the same, a trolley wheel rotatably mounted on the shaft, angular levers pivotally mounted one upon each end of the shaft, said angle levers having each a long and a short arm, rearwardly leaning guarding fingers carried one by each of the long arms and extending beyond and inward over the edges of the trolley wheel, a stud on each of the short arms, a side rod havingits rear end provided with a slot engaged by thestud, a the front end of said rod having connection near the lower side of the upper end of the main pole section, and a spring arranged to bend the pole at the joint whenever the trolley wheel is pressed with less than normal force upward against the line wire, and means for limiting said bending.

2. In a device of the kind described, the combination of a trolley pole having a main section and a hinged extension or top section with a fork-shape upper end, a shaft fixed in the fork and traversing the gap of the same, a trolley wheel rotatably mounted on the shaft angular levers pivotally mounted one upon each end of the shaft, said angle levershaving each a long and a short arm, rearwardly leaning guarding fingers carried one by each of the long arms and extending beyond and inward over the edges of the trolley wheel, a stud on each of the short arms, a side rod having its rear end provided with a slot engaged by the stud, a spring connecting the'rod with thearm, and a spring arranged to bend the pole at the joint whenever the trolley wheel is pressed with less than normal force upward against the line wire, and meansv for limiting said bending; said hinge composed of two hinge members, each with a downward projection below the pole, the front projection having a slotted rearward arm, a rock-shaft journaled in the ends of said arm and provided with a downward arm, a weight secured on the arm, a horizontally disposed transverse beam fixed on the front end of the rock shaft, links pivoted one at each side of. the front hinge member and having their upper ends pivoted to the rods extending from the guard-carrying levers at the sides of the fork; forwardly inclined levers pivoted with their lower ends one at each side of the front hinge member and provided with a catch normally engaging the rear edge of the ad- 7 jacent link, and links connecting the forward ends of the inclined arms with the ends of the transverse beam; and lugs at the sides of the front hinge member to engage thereto by a hinge composed of two adand limit the rearward motion of the sidev joining members, each member having a downward projection, the front projection having a rearward arm with a longitudinal slot in which the rear projection swings when the joint bends, means on the arm for limiting the motion of the rear projection, a helical contracting spring extending from the rear projection to the rear terminal of the slot, means for regulating the tension of said spring, and a trolley wheel mounted on the upper section of the pole.

4:- The combination with a trolley pole and a trolley wheel mounted at the top thereof, said pole composed of a lower main section and a top section hinged thereto by adjoining hinge members the front one of which projects below the pole and forms an arm extending rearwardly and provided with two side pins, a spring tending to bend the joint and throw the free end of the top section upward, a lever pivotally suspended from the top section of the pole between the two pins, said lever having a notch adapted to engage one of the pins when the lever is swung in that direction, a hand cord suspended from the lower end of the lever, and

a spring arranged to act on the lever to hold it normally disengaged from the pin.

5. In a device of the kind described, the combination with a trolley pole and a trolley wheel mounted on the same, of two independent guards carried by the pole one at each side of the trolley wheel to prevent the wheel from slipping sidewise from under the line Wire, said guards being mounted to tilt upward to a higher position when so desired, a weight suspended from the lower side of the pole and adapted to swing to either side, and operative connection between said weight and said guards to raise alternately either one of them when the weight swings to the one side or the other according as the car carrying the trolley pole may turn to the right or the left on curves of the track.

In testimony whereof I affix my signature, in presence of two witnesses.

OLE N. IVERSON.

Witnesses:

CARL J. Woonnow, A. ANDERSON.

Copies of this patent may be obtained for five cents each, by addressing the "Commissioner of Patents, Washington, D. C. 

